CN112545255A

CN112545255A - Double-temperature display cabinet and control method thereof

Info

Publication number: CN112545255A
Application number: CN201910920123.XA
Authority: CN
Inventors: 鱼剑琳; 钱苏昕; 晏刚; 窦晓宁; 姜天信; 王春涛
Original assignee: Shandong New Beiyang Information Technology Co Ltd; Weihai New Beiyang Digital Technology Co Ltd
Current assignee: Shandong New Beiyang Information Technology Co Ltd; Weihai New Beiyang Digital Technology Co Ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-03-26

Abstract

The invention relates to the technical field of storage devices, and particularly discloses a dual-temperature display cabinet which comprises a cabinet, a laminate and a heat pump device, wherein an article storage area and an air channel positioned outside the article storage area are arranged in the cabinet; the heat pump device comprises a compressor, a first condenser, a throttling element, an evaporator and an evaporator fan, wherein the compressor, the first condenser, the throttling element and the evaporator fan form a circulation loop, the evaporator and the evaporator fan are arranged in an air duct and can refrigerate a first temperature storage area, the first condenser is embedded in a laminate and can heat a second temperature storage area, and therefore the double-temperature storage function can be achieved by one set of heat pump device, energy consumption can be effectively reduced, the first condenser is embedded in the laminate and can save space, and the structure is compact.

Description

Double-temperature display cabinet and control method thereof

Technical Field

The invention relates to the technical field of storage devices, in particular to a dual-temperature display cabinet and a control method thereof.

Background

In supermarkets, malls, restaurants and the like, articles such as fresh food or food materials are usually displayed or displayed through showcases.

In the related art, an open showcase is provided, in which an open storage chamber is provided, a refrigerating device is provided inside the showcase, and cold air is generated by the refrigerating device and blown to the storage chamber by a fan to refrigerate and keep fresh the goods in the storage chamber. In order to maintain the temperature in the storage bin stable, an air curtain is arranged at the opening, and the heat exchange between the inside and the outside of the display cabinet is separated through the air curtain. However, the showcase provided in the related art has a single operation mode, and generally only enables the articles in the storage compartment to be at the same temperature, and when different articles need to be stored in different temperature environments, the showcase provided in the related art cannot meet the requirement.

In view of the above, there is provided another open showcase having different temperature environments, in which a hot air source and a cold air source are provided, and one of the hot air source and the cold air source heats or cools the contents in the showcase according to the heating or cooling requirement, so as to maintain different temperatures in the showcase, and thus the requirements of various contents on different temperatures can be met.

Disclosure of Invention

The invention aims to: a dual-temperature showcase and a control method thereof are provided to make the showcase compact in structure and low in power consumption.

In one aspect, the present invention provides a dual temperature display case comprising:

the air channel is positioned outside the article storage area, the article storage area comprises a first temperature storage area and a second temperature storage area, the air channel comprises an air inlet communicated with the outside, and a first vent communicated with the air channel is arranged on the side wall of the first temperature storage area;

the laminate is arranged in the second temperature storage area and used for supporting an article;

the heat pump device comprises a compressor, a first condenser, a throttling element, an evaporator and an evaporator fan, wherein the compressor, the first condenser, the throttling element and the evaporator form a first circulation loop, the evaporator and the evaporator fan are arranged in the air duct, and the first condenser is buried in the laminated plate.

As a preferred technical scheme of the dual-temperature display cabinet, a second ventilation opening communicated with the air duct is arranged on the side wall of the second temperature storage area, the dual-temperature display cabinet further comprises a valve, the valve is provided with a separation position and an avoidance position, when the valve is located at the separation position, the valve separates the air duct from the second ventilation opening, and when the valve is located at the avoidance position, the air duct is communicated with the second ventilation opening.

As a preferable embodiment of the two-temperature showcase, the two-temperature showcase further includes a second condenser connected in parallel to the first condenser, the heat pump device has a first operation mode and a second operation mode, the compressor, the first condenser, the throttling element, and the evaporator constitute the first circulation circuit when the heat pump device is in the first operation mode, and the compressor, the second condenser, the throttling element, and the evaporator constitute the second circulation circuit when the heat pump device is in the second operation mode.

As a preferable technical solution of the dual temperature showcase, the heat pump apparatus further includes a first three-way solenoid valve, a second three-way solenoid valve, a first check valve, and a second check valve, the discharge port of the compressor is connected to a first joint of the first three-way solenoid valve, a first end of the first condenser is connected to a second joint of the first three-way solenoid valve, a second end of the first condenser is connected to a first end of the first check valve, a first end of the second condenser is communicated to a third joint of the first three-way solenoid valve, a second end of the second condenser is connected to a first end of the second check valve, a second end of the first check valve and a second end of the second check valve are respectively communicated to a first joint and a second joint of the second three-way solenoid valve, a third joint of the second three-way solenoid valve is connected to the throttling element, the throttling element is connected to the evaporator, and the evaporator is connected with a suction port of the compressor.

As a preferred technical solution of the dual-temperature showcase, the plurality of shelf plates are arranged in the second temperature storage region at intervals, the first condenser includes a plurality of inflation type condenser branches connected in series or in parallel, and the inflation type condenser branches are buried in the plurality of shelf plates in a one-to-one correspondence manner.

As a preferred technical scheme of the dual-temperature display cabinet, the air duct further comprises an air outlet, the air inlet and the air outlet are respectively arranged on two opposite side walls of the article storage area, and the air outlet faces the air inlet.

As a preferable technical solution of the dual-temperature showcase, the second temperature storage region is located above the first temperature storage region, the air inlet and the air outlet are oppositely arranged in an up-down direction, the air inlet is disposed at a front end of a bottom wall of the first temperature storage region, and the air outlet is disposed at a front end of a top wall of the second temperature storage region.

As the preferred technical scheme of two temperature show cases, the plywood includes zone of heating and water conservancy diversion layer, the zone of heating set up in the top of water conservancy diversion layer, first condenser bury underground in the zone of heating, the water conservancy diversion layer has the first opening of intercommunication wind channel and the second opening of intercommunication first temperature storage area.

As a preferable technical solution of the dual-temperature showcase, the second opening is provided at a front end of the flow guide layer, and the second opening faces the air inlet.

In another aspect, the present invention provides a method for controlling a dual-temperature showcase, which is applied to the dual-temperature showcase according to any one of the above aspects, including: acquiring a real-time temperature T1 of the first temperature storage area and comparing with a first set temperature Tc, acquiring a real-time temperature T2 of the second temperature storage area and comparing with a second set temperature Th,

and if T1 is more than Tc and/or T2 is less than Th, the compressor is started, and the evaporator fan is controlled to operate at a set rotating speed.

The invention has the beneficial effects that:

the invention provides a dual-temperature display cabinet which comprises a cabinet, a layer plate and a heat pump device. An air duct and an article storage area are arranged in the cabinet, the air duct is positioned outside the article storage area, the article storage area comprises a first temperature storage area and a second temperature storage area, the air duct comprises an air inlet communicated with the outside, a first vent communicated with the air duct is arranged on the side wall of the first temperature storage area, a laminate is arranged in the second temperature storage area, and the laminate is used for supporting articles; the heat pump device comprises a compressor, a first condenser, a throttling element, an evaporator and an evaporator fan, wherein the compressor, the first condenser, the throttling element and the evaporator fan form a circulation loop, the evaporator and the evaporator fan are arranged in the air duct, and the first condenser is buried in the laminated plate. This dual temperature show case heats the second temperature reservoir through first condenser, refrigerates first temperature reservoir through the evaporimeter, can possess dual temperature and store the function, compares show case among the correlation technique and need set up heating system and refrigerating system alone, can effectively reduce the energy consumption. And through burying first condenser in the plywood of second temperature storage area, can effectively reduce heat pump device's space demand, can make the show case compacter.

The invention provides a control method of the dual-temperature showcase, which comprises the steps of obtaining the real-time temperature T1 of the first temperature storage area and comparing the real-time temperature T1 with the first set temperature Tc, and obtaining the real-time temperature T2 of the second temperature storage area and comparing the real-time temperature T2 with the second set temperature Th. If T1 is more than Tc and/or T2 is less than Th, the compressor is started and the fan of the evaporator is controlled to operate at the maximum set rotating speed. At this moment, heat through first condenser to second temperature storage area, can make second temperature storage area rapid heating up, refrigerate first temperature storage area through the evaporimeter, can make first temperature storage area rapid cooling, realize the temperature regulation to first temperature storage area and second temperature storage area.

Drawings

Fig. 1 is a first schematic structural diagram of a dual-temperature display case (a heat pump device is in a first operation mode) in the embodiment of the invention;

fig. 2 is a second schematic structural diagram of the dual-temperature display case according to the embodiment of the invention (the heat pump device is in the second operation mode);

FIG. 3 is a first schematic view of the heat pump apparatus according to the embodiment of the present invention (the heat pump apparatus is in the first operation mode);

fig. 4 is a second schematic structural diagram of the heat pump apparatus according to the embodiment of the present invention (the heat pump apparatus is in the second operation mode).

In the figure:

1-a cabinet; 11-an air duct; 111-air inlet; 112-air outlet; 12-a first temperature storage zone; 121-a first vent; 13-a second temperature storage zone; 131-a second vent; 14-a holding bin;

2-a support plate;

3-layer plate; 31-a heating layer; 32-a flow guiding layer;

4-a heat pump device; 40-a compressor; 41-a first condenser; 42-a throttling element; 43-an evaporator; 44-evaporator fan; 45-a second condenser; 46-a first three-way solenoid valve; 47-a second three-way solenoid valve; 48-a first one-way valve; 49-a second one-way valve;

5-an air valve;

61-a first temperature sensor; 62-second temperature sensor.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Referring to fig. 1 to 4, the present embodiment provides a dual-temperature showcase, which includes a cabinet 1, a shelf 3, and a heat pump device 4. Be equipped with wind channel 11 and article in the rack 1 and deposit the district, wind channel 11 is located the outside that the district was deposited to the article, and the district is deposited to the article includes first temperature storage area 12 and second temperature storage area 13, and wind channel 11 includes the income wind gap 111 with external intercommunication, is equipped with the first vent 121 with wind channel 11 intercommunication on the lateral wall of first temperature storage area 12. The laminate 3 is arranged in the second temperature storage area 13, and the laminate 3 is used for supporting articles; the heat pump apparatus 4 includes a compressor 40, a first condenser 41, a throttle member 42, an evaporator 43, and an evaporator fan 44, which constitute a first circulation circuit, the evaporator 43 and the evaporator fan 44 being disposed in the air duct 11, the first condenser 41 being embedded in the layer plate 3.

The dual-temperature showcase generates heat through the first condenser 41, and radiates the heat through the laminate 3, so that articles supported on the laminate 3 can be heated, and the second temperature storage region 13 can be used for storing articles with higher storage temperature requirements; under the drive of the evaporator fan 44, air enters the air duct 11 from the air inlet 111 and exchanges heat with the evaporator 43, and after being cooled, the air enters the first temperature storage area 12 from the first air vent 121 and refrigerates the first temperature storage area 12, so that the first temperature storage area 12 can be used for storing articles with lower storage temperature requirements, therefore, the dual-temperature display case in the embodiment can have the dual-temperature storage function through one set of heat pump device 4, and compared with the display case in the related art, the dual-temperature display case needs to be provided with a heating system and a refrigerating system separately, and can effectively reduce energy consumption. And by embedding the first condenser 41 in the tier floor 3 of the second temperature storage area 13, the space requirement of the heat pump device 4 can be effectively reduced, and the structure of the showcase can be made more compact.

It should be noted that the embedding position of the first condenser 41 is not limited in this embodiment, and in other embodiments, the first condenser 41 may also be embedded in the sidewall of the second temperature storage area 13, a part of the first condenser 41 may also be embedded in the sidewall of the second temperature storage area 13, and another part of the first condenser 41 may be embedded in the tier floor 3.

Optionally, the dual-temperature showcase further comprises a support plate 2, the support plate 2 being disposed in the first temperature storage region 12, the support plate 2 being for supporting the articles.

Optionally, a containing bin 14 is further disposed in the cabinet 1, and the containing bin 14 is used for storing the compressor 40 and the throttling element 42. Preferably, the accommodating chamber 14 is located above or below the article storage area, so that the length and width of the cabinet 1 can be reduced. It is understood that the present embodiment is not limited to the position of the accommodating chamber 14, and in other embodiments, the accommodating chamber may be disposed on the back or the side of the cabinet 1.

Optionally, a second ventilation opening 131 communicated with the air duct 11 is arranged on the side wall of the second temperature storage area 13, the dual-temperature display cabinet further comprises a valve, the valve has a separation position and an avoidance position, when the valve is located at the separation position, the valve separates the air duct 11 from the second ventilation opening 131, and when the valve is located at the avoidance position, the air duct 11 is communicated with the second ventilation opening 131. By arranging the second ventilation opening 131 and the valve, when the temperature of the second temperature storage area 13 exceeds the set temperature, the valve can be located at the avoidance position, so that the cold air in the air duct 11 can be input into the second temperature storage area 13 through the second ventilation opening 131, and the temperature of the second temperature storage area 13 can be adjusted; when the temperature of the second temperature storage area 13 is lower than the set temperature, the valve may be located at the separation position, so that the second temperature storage area 13 may be rapidly heated by the first condenser 41 to increase the temperature of the second temperature storage area 13.

In this embodiment, the valve includes an air valve 5, the air valve 5 is disposed at the second air vent 131, when the valve is located at the separation position, the air valve 5 is closed, and at this time, the air valve 5 blocks the second air vent 131, so that the cold air in the air duct 11 can only enter the first temperature storage area 12 through the first air vent 121 and cannot enter the second temperature storage area 13; when the valve is located at the avoiding position, the air valve 5 is opened, the second ventilation opening 131 is communicated with the air duct 11 and the second temperature storage area 13, and cold air in the air duct 11 can enter the first temperature storage area 12 and the second temperature storage area 13 simultaneously so as to refrigerate the first temperature storage area 12 and the second temperature storage area 13 simultaneously. Preferably, the number of the second ventilation openings 131 is plural, the number of the dampers 5 is also plural, and the plural dampers 5 are disposed in the plural second ventilation openings 131 in a one-to-one correspondence.

As an alternative thereto, the valve comprises a diaphragm, the drive member is arranged to drive the diaphragm to reciprocate, the air duct 11 comprises a first section and a second section, wherein the air inlet 111 is communicated with the first section, the evaporator 43 and the evaporator fan 44 are also arranged in the first section, the first section is communicated with the first ventilation opening 121, the second section is communicated with the second ventilation opening 131, the partition plate is arranged between the first section and the second section, the side wall of the air duct 11 is provided with a slot, the partition plate and the slot are oppositely arranged, and the partition is configured to be inserted into or withdrawn from the duct 11 by the slot, when the valve is in the partition position, the partition board is inserted into the air duct 11, the partition board separates the first section from the second section, the first section is not communicated with the second section, and at this time, the cold air in the air duct 11 enters the first temperature storage area 12 only through the first ventilation opening 121 and cannot enter the second temperature storage area 13; when the valve is located at the avoiding position, the partition board exits the air duct 11, the first section is communicated with the second section, and cold air in the air duct 11 can enter the first temperature storage area 12 and the second temperature storage area 13 simultaneously so as to refrigerate the first temperature storage area 12 and the second temperature storage area 13 simultaneously. Preferably, the valve further comprises a driving member for driving the partition plate to be inserted into or withdrawn from the air duct 11, and the driving member may be an air cylinder or an electric push rod.

As another alternative, the valve includes a partition plate and a driving member, the driving member is used for driving the partition plate to rotate, the air duct 11 includes a first section and a second section, wherein the air inlet 111 is communicated with the first section, the evaporator 43 and the evaporator fan 44 are also arranged in the first section, the first section is communicated with the first vent 121, the second section is communicated with the second vent 131, the partition plate is arranged between the first section and the second section, the partition plate is in a disc-shaped structure, the partition plate is located in the air duct 11, the outer diameter of the partition plate is matched with the inner diameter of the air duct 11, the partition plate is pivoted with the side wall of the air duct 11 through a rotating shaft, when the valve is located at the avoiding position, the plate surface of the partition plate is perpendicular to the extending direction of the air duct 11, and the partition plate separates the; when the valve is located at the separation position, the plate surface of the partition plate is parallel to the extending direction of the air duct 11, so that the first section is communicated with the second section, and the driving member can be a motor or a rotary cylinder.

Further, the first condenser 41 includes an inflatable condenser branch buried in the floor plate. In this embodiment, a plurality of plates 3 are spaced in the second temperature storage area 13, the first condenser 41 includes a plurality of roll-bond condenser branches connected in series or in parallel, and the roll-bond condenser branches are embedded in the plurality of plates 3 in a one-to-one correspondence. Specifically, in the present embodiment, the number of the laminates 3 is two, and it should be noted that the number of the laminates 3 is not limited in the present embodiment, and in other embodiments, the number of the laminates 3 may be set according to actual needs. Preferably, a second ventilation opening 131 is provided on the sidewall of the second temperature storage region 13 corresponding to each layer plate 3, and the second ventilation opening 131 is located above the corresponding layer plate 3.

In this embodiment, a plurality of support plates 2 are spaced in the first temperature storage region 12. In particular, the number of support plates 2 is likewise two. At least one first ventilation opening 121 is disposed on the sidewall of the first temperature storage area 12 corresponding to each support plate 2, and the first ventilation opening 121 is located above the corresponding support plate 2, it should be noted that the number of the support plates 2 is not limited in this embodiment, and in other embodiments, the number of the support plates 2 may be set according to actual needs.

Optionally, the dual-temperature showcase further includes a second condenser 45, the second condenser 45 being connected in parallel to the first condenser 41, the heat pump apparatus 4 having a first operation mode and a second operation mode, the compressor 40, the first condenser 41, the throttling element 42, and the evaporator 43 constituting a first circulation circuit when the heat pump apparatus 4 is in the first operation mode, and the compressor 40, the second condenser 45, the throttling element 42, and the evaporator 43 constituting a second circulation circuit when the heat pump apparatus 4 is in the second operation mode. In the present embodiment, the heat pump device 4 can be switched between the first operation mode and the second operation mode, when the heat pump device 4 operates in the first operation mode, the first condenser 41 can be used for heating the second temperature storage region 13, and the evaporator 43 can be used for cooling the first temperature storage region 12, so that the dual temperature showcase can have a heating and cooling mode; when the heat pump device 4 operates in the second operation mode, because the second condenser 45 is disposed in the accommodating bin 14, the heat pump device 4 only refrigerates the goods storage area through the evaporator 43, at this time, if the valve is located at the avoiding position, the air duct 11 can be communicated with the first temperature storage area 12 through the first vent 121 and communicated with the second temperature storage area 13 through the second vent 131, so that the heat pump device 4 can refrigerate the whole goods storage area, and thus the dual-temperature showcase can have a full-refrigeration mode; if the valve is located at the separation position, the air duct 11 is communicated with the first temperature storage area 12 only through the first ventilation opening 121, so that the heat pump device 4 can cool the first temperature storage area 12 and maintain the second temperature storage area 13 at a normal temperature. So that the dual-temperature showcase can have a normal-temperature cooling mode. Preferably, a second condenser 45 is provided in the housing bin 14.

Specifically, the heat pump device 4 further includes a first three-way solenoid valve 46, a second three-way solenoid valve 47, a first check valve 48 and a second check valve 49, wherein an exhaust port of the compressor 40 is connected with a first joint of the first three-way electromagnetic valve 46, a first end of the first condenser 41 is connected with a second joint of the first three-way electromagnetic valve 46, a second end of the first condenser 41 is connected with a first end of the first check valve 48, a first end of the second condenser 45 is communicated with a third joint of the first three-way electromagnetic valve 46, a second end of the second condenser 45 is connected with a first end of the second check valve 49, a second end of the first check valve 48 and a second end of the second check valve 49 are respectively communicated with a first joint and a second joint of the second three-way electromagnetic valve 47, a third joint of the second three-way electromagnetic valve 47 is connected to the throttling element 42, the throttling element 42 is connected to the evaporator 43, and the evaporator 43 is connected with an air suction port of the compressor 40. When the heat pump apparatus 4 is in the first operation mode, the first joint of the first three-way solenoid valve 46 communicates with the second joint, and the first joint and the third joint of the second three-way solenoid valve 47 communicate, so that the compressor 40, the first condenser 41, the throttling element 42, and the evaporator 43 constitute a first circulation circuit; when the heat pump apparatus 4 is in the second operation mode, the first joint of the first three-way solenoid valve 46 communicates with the third joint, and the second joint and the third joint of the second three-way solenoid valve 47 communicate, so that the compressor 40, the second condenser 45, the throttling element 42, and the evaporator 43 constitute a second circulation circuit. In this embodiment, the throttling element 42 is preferably an expansion valve, and in other embodiments, the throttling element 42 may also be a capillary tube. Preferably, a first three-way solenoid valve 46, a second three-way solenoid valve 47, a first one-way valve 48 and a second one-way valve 49 are provided in the holding bin 14.

Optionally, the air duct 11 further includes an air outlet 112, the air inlet 111 and the air outlet 112 are respectively disposed on two opposite sidewalls of the article storage area, and the air outlet 112 is disposed toward the air inlet 111. Therefore, under the driving of the evaporator fan 44, the air flow in the article storage area can enter the air duct 11 through the air inlet 111 and enter the article storage area through the air outlet 112, so that the air flow in the article storage area can be circulated and a cold air curtain can be formed between the air inlet and the air outlet 112, and particularly when the heat pump device 4 operates in the second operation mode, the cold air in the article storage area can be prevented from leaking, which is beneficial to keeping the temperature in the article storage area balanced. Specifically, in this embodiment, the second temperature storage area 13 is located above the first temperature storage area 12, the air inlet 111 and the air outlet 112 are oppositely disposed along the vertical direction, the air inlet 111 is disposed at the front end of the bottom wall of the first temperature storage area 12, and the air outlet 112 is disposed at the front end of the top wall of the second temperature storage area 13. The air duct 11 extends upward from the bottom, back of the article storage area and forward from the top of the article storage area. In other embodiments, the first temperature storage area 12 and the second temperature storage area 13 may be arranged at intervals in the horizontal direction.

Alternatively, the laminate 3 includes a heating layer 31 and a flow guide layer 32, the heating layer 31 is disposed above the flow guide layer 32, the first condenser 41 is embedded in the heating layer 31, and the flow guide layer 32 has a first opening communicating with the air duct 11 and a second opening communicating with the first temperature storage region 12. Preferably, a second opening is provided at the front end of the laminate 3, the second opening facing the air inlet 111. Therefore, the cold air in the air duct 11 can flow through the diversion layer 32 and overflow from the front end of the layer plate 3, and the air flow overflowing from the front end of each layer plate 3 is converged and flows to the air inlet 111 to form an air curtain, which is beneficial to keeping the temperature balance in the article storage area. Specifically, when the dual-temperature showcase is in the full cooling mode and the heating cooling mode, part of the cold air in the air duct 11 flows into the article storage region through the air outlet 112 at the top of the showcase and the second openings of the respective flow guide layers 32, and the cold air flowing out of the air outlet 112 joins the cold air flowing out of the second openings of the respective flow guide layers 32, flows to the air inlet 111 of the air duct 11, and forms a circulation, so that a stable air curtain can be formed.

Optionally, the dual-temperature display case further comprises a control device, wherein the control device comprises a controller, a first temperature sensor 61 arranged in the first temperature storage area 12 and a second temperature sensor 62 arranged in the second temperature storage area 13, wherein the first temperature sensor 61 is used for detecting the temperature of the first temperature storage area 12 and feeding back a detection signal to the controller; the second temperature sensor 62 is used for detecting the temperature of the second temperature storage area 13 and feeding back the detection signal to the controller. The controller is configured to control the operation of the heat pump apparatus 4 according to the detection results of the first temperature sensor 61 and the second temperature sensor 62. Preferably, the controller is capable of controlling the flow paths of the first three-way solenoid valve 46 and the second three-way solenoid valve 47, the start and stop of the compressor 40 and the rotation speed of the evaporator fan 44 according to the detection results of the first temperature sensor 61 and the second temperature sensor 62, so as to realize the switching between the first operation mode and the second operation mode and the automatic temperature control in the first operation mode.

The dual-temperature display cabinet provided by the embodiment has a heating cold mode, a full-refrigeration mode and a normal-temperature refrigeration mode, and specifically comprises the following steps:

in the heating and cooling mode, referring to fig. 1 and 3, the valve is at the separation position, the valve blocks the cold air from entering the second temperature storage area 13, and the heat pump device 4 is in the first operation mode, the first three-way electromagnetic valve 46 is connected to the first condenser 41 and is not connected to the second condenser 45. At this time, the high-temperature and high-pressure refrigerant flows out from the exhaust port of the compressor 40, passes through the flow path of the first condenser 41, directly transfers heat to the articles placed on the laminate 3 through heat conduction and natural convection, and then liquefies, the liquefied refrigerant flows to the throttling element 42 through the first one-way valve 48 and the second three-way electromagnetic valve 47 to complete adiabatic throttling, the throttled refrigerant enters the evaporator 43, absorbs heat and evaporates and then returns to the compressor 40, in the process, the evaporator fan 44 sucks the outside air from the air inlet 111 of the air duct 11, and after the temperature of the evaporator 43 is reduced, the cold air can be conveyed to the first temperature storage area 12 through the first vent 121 of the air duct 11; the heat emitted from the first condenser 41 is supplied to the second temperature storage area 13, and the second temperature storage area 13 is heated.

In the full cooling mode, referring to fig. 2 and 4, the valve is in the escape position, the air duct 11 is communicated with the second temperature storage area 13 through the second ventilation opening 131, and the cold air in the air duct 11 can enter the second temperature storage area 13. In the second operation mode of the heat pump apparatus 4, the first three-way solenoid valve 46 is in communication with the second condenser 45 and is not in communication with the first condenser 41, and at this time, the refrigerant flows out from the exhaust port of the compressor 40, is liquefied after heat exchange by the second condenser 45, flows to the throttling element 42 through the second one-way valve 49 and the second three-way electromagnetic valve 47 to complete adiabatic throttling, enters the evaporator 43, absorbs heat and evaporates, returns to the compressor 40, in the process, the evaporator fan 44 sucks the outside air from the air inlet 111 of the air duct 11, and after the temperature of the evaporator 43 is reduced, the cold air can be conveyed to the article storage area through the air duct 11 via the air vents, the cold air can be transported to the first temperature storage area 12 through the air duct 11 via each first ventilation opening 121, and is delivered to the second temperature storage region 13 through each second ventilation opening 131, thereby realizing the refrigeration of the whole article storage region.

In the normal temperature refrigeration mode, the valve is at the separation position, the valve blocks the cold air from entering the second temperature storage area 13, the heat pump device 4 is in the second operation mode, the first three-way electromagnetic valve 46 is communicated with the second condenser 45 and is not communicated with the first condenser 41, at this time, the refrigerant flows out from the exhaust port of the compressor 40, is liquefied after heat exchange by the second condenser 45, flows to the throttling element 42 through the second one-way valve 49 and the second three-way electromagnetic valve 47 to complete adiabatic throttling, enters the evaporator 43, absorbs heat and evaporates, returns to the compressor 40, in the process, the evaporator fan 44 sucks the outside air from the air inlet 111 of the air duct 11, and after the temperature of the air is reduced by the evaporator 43, the cold air can be delivered to the first temperature storage area 12 through the air duct 11 via each first ventilation opening 121, so as to cool the first temperature storage area 12, and the second temperature storage area 13 is kept at normal temperature.

In the full cooling mode, the first temperature sensor 61 detects the temperature of the first temperature storage area 12, the second temperature sensor 62 detects the temperature of the second temperature storage area 13, and feeds back the detection signal to the controller, and when the temperatures of the first temperature storage area 12 and the second temperature storage area 13 are lower than the set temperature, the controller will turn off the compressor 40; when the temperatures of the first temperature storage area 12 and the second temperature storage area 13 are higher than the set temperature, the controller will control the heat pump device 4 to operate in the full cooling mode again until the temperatures are lower than the set temperature again, and the controller turns off the compressor 40 again. The circulation is repeated in this way, so that the temperatures of the second temperature storage area 13 and the first temperature storage area 12 of the display cabinet are always lower than the set temperature, and the refrigeration effect is ensured.

The embodiment also provides a control method of the dual-temperature display cabinet, which is suitable for the dual-temperature display cabinet in the scheme, and the control method of the dual-temperature display cabinet comprises the following steps:

the real-time temperature T1 of the first temperature storage section 12 is acquired and compared with the first set temperature Tc, and the real-time temperature T2 of the second temperature storage section 13 is acquired and compared with the second set temperature Th.

If T1 > Tc (i.e., the temperature in the first temperature storage area 12 is higher) and/or T2 < Th (i.e., the temperature in the second temperature storage area 13 is lower), the compressor 40 is turned on and the evaporator fan 44 is controlled to operate at the set rotational speed.

In this embodiment, the set rotation speed is the maximum rated rotation speed of the evaporator fan 44, at this time, the controller controls the heat pump device 4 to operate in the first operation mode, and since the evaporator fan 44 operates at the maximum set rotation speed, the amount of cold air delivered to the first temperature storage area 12 is sufficient, and the first temperature storage area 12 can be cooled rapidly, so that the first temperature storage area 12 is cooled rapidly; the first condenser 41 can rapidly heat the second temperature storage area 13, so that the temperature of the second temperature storage area 13 is rapidly increased. In other embodiments, the set rotation speed can be set according to actual needs.

Alternatively, when T2 > Th and T1 > Tc (i.e., the temperatures of both the first temperature storage zone 12 and the second temperature storage zone 13 are high), the controller turns on the compressor 40 and controls the heat pump apparatus 4 to operate in the second operating mode, with the evaporator fan 44 operating at the maximum set rotational speed, to lower the temperatures of the first temperature storage zone 12 and the second temperature storage zone 13 by fully cooling the article storage zones.

Alternatively, when T2 < Th and T1 < Tc (i.e., the temperatures of both the first temperature storage zone 12 and the second temperature storage zone 13 are low), the controller turns on the compressor 40 and controls the heat pump apparatus 4 to operate in the first operating mode with the evaporator fan 44 operating at the minimum set rotational speed. Since the evaporator fan 44 is operated at the minimum set rotational speed, the amount of cold air supplied to the first temperature storage area 12 is small, which can keep the temperature of the first temperature storage area 12, and the first condenser 41 can normally heat the second temperature storage area 13, so that the temperature of the second temperature storage area 13 is rapidly increased.

In any other case not falling into the above three cases, the controller turns off the compressor 40.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A dual temperature display case, comprising:

the cabinet comprises a cabinet (1), wherein an air duct (11) and an article storage area are arranged in the cabinet (1), the air duct (11) is positioned outside the article storage area, the article storage area comprises a first temperature storage area (12) and a second temperature storage area (13), the air duct (11) comprises an air inlet (111) communicated with the outside, and a first ventilation opening (121) communicated with the air duct (11) is arranged on the side wall of the first temperature storage area (12);

a deck (3), the deck (3) being disposed in the second temperature storage area (13), the deck (3) being for supporting an item;

the heat pump device (4) comprises a compressor (40), a first condenser (41), a throttling element (42), an evaporator (43) and an evaporator fan (44), wherein the compressor (40), the first condenser (41), the throttling element (42) and the evaporator (43) form a first circulation loop, the evaporator (43) and the evaporator fan (44) are arranged in the air duct (11), and the first condenser (41) is buried in the layer plate (3).

2. The dual-temperature showcase according to claim 1, wherein a second ventilation opening (131) communicating with the air passage (11) is provided on a side wall of the second temperature storage region (13), the dual-temperature showcase further comprising a valve having a partition position and an escape position, the valve blocking the air passage (11) from the second ventilation opening (131) when the valve is in the partition position, and the air passage (11) communicating with the second ventilation opening (131) when the valve is in the escape position.

3. The dual temperature display case of claim 1, further comprising a second condenser (45), the second condenser (45) being connected in parallel with the first condenser (41), the heat pump apparatus (4) having a first operation mode and a second operation mode, the compressor (40), the first condenser (41), the throttling element (42) and the evaporator (43) constituting the first circulation circuit when the heat pump apparatus (4) is in the first operation mode, the compressor (40), the second condenser (45), the throttling element (42) and the evaporator (43) constituting a second circulation circuit when the heat pump apparatus (4) is in the second operation mode.

4. The dual temperature showcase according to claim 3, wherein the heat pump apparatus (4) further comprises a first three-way solenoid valve (46), a second three-way solenoid valve (47), a first check valve (48), and a second check valve (49), an exhaust port of the compressor (40) is connected to a first junction of the first three-way solenoid valve (46), a first end of the first condenser (41) is connected to a second junction of the first three-way solenoid valve (46), a second end of the first condenser (41) is connected to a first end of the first check valve (48), a first end of the second condenser (45) is communicated to a third junction of the first three-way solenoid valve (46), a second end of the second condenser (45) is connected to a first end of the second check valve (49), and a second end of the first check valve (48) and a second end of the second check valve (49) are respectively connected to a third junction of the second three-way solenoid valve (47) The first joint and the second joint are communicated, the third joint of the second three-way electromagnetic valve (47) is connected to the throttling element (42), the throttling element (42) is connected to the evaporator (43), and the evaporator (43) is connected with a suction port of the compressor (40).

5. A dual temperature display case according to claim 1, wherein a plurality of shelves (3) are provided at intervals in the second temperature storage region (13), the first condenser (41) comprises a plurality of roll-bond condenser branches connected in series or in parallel, and the roll-bond condenser branches are buried in the plurality of shelves (3) in a one-to-one correspondence.

6. The dual-temperature showcase according to claim 1, wherein the duct (11) further comprises an air outlet (112), the air inlet (111) and the air outlet (112) are respectively provided on opposite side walls of the article storage region, and the air outlet (112) is provided toward the air inlet (111).

7. The dual-temperature showcase according to claim 6, wherein the second temperature storage region (13) is located above the first temperature storage region (12), the air inlet (111) and the air outlet (112) are oppositely disposed in an up-down direction, the air inlet (111) is disposed at a front end of a bottom wall of the first temperature storage region (12), and the air outlet (112) is disposed at a front end of a top wall of the second temperature storage region (13).

8. The dual temperature showcase according to claim 1, wherein the laminate (3) includes a heating layer (31) and a flow guide layer (32), the heating layer (31) being disposed above the flow guide layer (32), the first condenser (41) being buried in the heating layer (31), the flow guide layer (32) having a first opening communicating with the air duct (11) and a second opening communicating with the first temperature storage region (12).

9. The dual temperature display case of claim 8, wherein the second opening is provided at a front end of the flow guide layer (32), and the second opening faces the air inlet (111).

10. A method of controlling a dual temperature display case adapted for use in the dual temperature display case of any one of claims 1-9, the method comprising:

obtaining a real-time temperature T1 of the first temperature storage zone (12) and comparing it with a first set temperature Tc, obtaining a real-time temperature T2 of the second temperature storage zone (13) and comparing it with a second set temperature Th,

if T1 > Tc and/or T2 < Th, the compressor (40) is turned on and the evaporator fan (44) is controlled to operate at a set speed.